<template>
	<view class="goods-item">
		<!-- 商品左侧图片区域 -->
		<view class="goods-item-left">
			<radio v-if="showRadio" :checked="goods.goods_state" color="#C00000" @click="radioClickHandler"></radio>
			<image :src="goods.goods_small_logo || defaultPic" class="goods-pic"></image>
		</view>
		<!-- 商品右侧信息区域 -->
		<view class="goods-item-right">
			<!-- 商品标题 -->
			<view class="goods-name">
				{{goods.goods_name}}
			</view>
			<view class="goods-info-box">
				<!-- 商品价格 -->
				<view class="goods-price">
					￥{{goods.goods_price | toFixed}}
				</view>
				<!-- 商品数量 -->
				<uni-number-box v-if="showNum" :min="1" :value="goods.goods_count" @change="numChangeHandler"></uni-number-box>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		name:"my-goods",
		// 定义props属性，用了接受外界传递到当前组件的数据
		props: {
			// 商品的对象信息
			goods: {
				type: Object,
				default: []
			},
			// 是否展示图片左侧的radio
			showRadio: {
				type: Boolean,
				// 如果外界没有指定show-radio属性的值，则默认不展示radio组件
				default: false
			},
			// 是否展示NumberBox组件
			showNum: {
				type: Boolean,
				// 如果外界没有指定show-num属性的值，则默认不展示numberbox组件
				default: false
			}
		},
		data() {
			return {
				// 默认的空图片
				defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default.jpg'
			};
		},
		filters: {
			//把数组处理未带两位小数点的数字
			toFixed(num){
				return Number(num).toFixed(2)
			}
		},
		methods: {
			// radio组件的点击事件处理函数
			radioClickHandler(){
				// 通过this.$emit()触发外界通过@绑定的radio-change事件
				// 同时把商品的id和勾选状态作为参数传递给radio-change事件处理函数
				this.$emit('radio-change',{
					// 商品id
					goods_id: this.goods.goods_id,
					// 商品最新的勾选状态
					goods_state: !this.goods.goods_state
				})
			},
			// number组件的点击事件处理函数
			numChangeHandler(val){
				this.$emit("num-change", {
					// 商品id
					goods_id: this.goods.goods_id,
					// 商品最新数量
					goods_count: +val //+保证最后得到的是个数字，隐式转换或者val - 0
				})
			}
		}
	}
</script>

<style lang="scss">
.goods-item{
	width: 750rpx;
	box-sizing: border-box;
	display: flex;
	padding:10px 5px;
	border-bottom: 1px solid #f0f0f0;
	.goods-item-left{
		margin-right: 5px;
		display: flex;
		align-items: center;
		justify-content: space-between;
		.goods-pic{
			width: 100px;
			height: 100px;
			display: block;
		}
	}
	.goods-item-right{
		display: flex;
		flex: 1;
		flex-direction: column;
		justify-content: space-between;
		.goods-name{
			font-size: 13px
		}
		.goods-info-box{
			display: flex;
			align-items: center;
			justify-content: space-between;
			.goods-price{
				color: #C00000;
				font-size: 16px
			}
		}
	}
}
</style>